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Stockholders' Equity (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Accumulated other comprehensive loss primarily comprised of accumulated foreign currency translation adjustments    
Net unrealized gain (loss) on securities, net of tax $ (104)  
Cumulative foreign currency translation adjustments (765) (2,710)
Total accumulated Other Comprehensive Income (losses) $ (869) $ (2,710)